Loading machine



Mmh s, 1946.- I

" LEssMANN l. LoADlNG MACHINE Filed May 29 V4. sheets-Smet 1 Wma ATTORNEY' March 5, 1946. H. F. LESSMANN LOADING MACHINE Filed May 29, 1944 4 Sheets-Sheet 2 AHORA/EK .March 5, H F. `Il 'Es-SMANN y.

LOADING MACHINE Filed' May 29, 1944 4:v sheets-sheet s IN1/avro@ H. F. LESSMANN LOADING MACHINE Filed May 29, 1944 March 5, 1946.

4 Sheets-Sheet 4 fm1/Wrap Herbe/ E ess/mmf? Arrow/EY portable loading Patented Mar. 5, Y1946 f n Y HerbertF. Lessmann. Des'Moines, Iowa "pplcation May2r9, 1944,'.Serial No. 537,846

bleof being A completely mounted. onthe tractorvr frame in aload-balancing arrangement withr load Y hoisting means. I Y

Yetanotherobject of this invention .is to pro-Y videa loading vmachine having a `pair of shovel."

ing means, and a b rake'for arresting the hoisting means in an operated position,v in which aclntch lever and a brake lever are inter-connected for concurrent and vcomplementary action' whereby' 'either' the clutch mechanism or 'the brake j mech'a nism is always in an operated position.

A feature @mais invention ishfouridin nie pro' 3o vision of a tractormounted loadingattachment having an uprightl frame and `a pairy of .pivotedr lifting arms arranged at vopposite sides; of the frame', in ,which the frontends of the arms project forwardly of the frame and carry.y a shovel therebetween, and carry pivots at their rear ends movl able longitudinally `of'frame members inclined' rearwardlyv and downwardly from the vupright are releasably retained;

frame. The arm pivots in a fixedy positionduring the initialv elevation of the shovel toa predeterminedheighte atwhich height. thezlifting varms are engaged byhooster arms pivotedon the upright frame andadapted.. forwardly of theI frame f concurrently; with the upward .movement of the ,F pivots' longitudinally ofthe to move the lifting arms bers, whereby the shovel at a maximumelevated position is positioned forwardly and away from' the uprightframe; i VFurtherV objects, -featuresand advantages `of this invention willbecornefapparent from the" following description when talen'in connectionV with' the accompanying drawings in which;f f

Fig. 1 is a side"elevationalview of the loading attachment ofthis inventionin assemblyv relation machine in'which a load-carry'- inclined lframe mernpivoted, arms, in which ashovel orscoop Vcarried onthe Q arms is automatically moved toa normal .loading position on lowering of v,the arms from a dumping positionfor the l* o 20 Y.A further -object of this invention is to provide .1 a loading'machine having a clutch operated hoist-f 'frame with a tractor, with vthe loadcarrying unitheing shown in itsuppermost position;

Fig. 2 is an enlarged rear A elevational view of the loading attachment' mounted on a tractor;

Fig. 3`is" a fragmentary .elevationalview show' f 'ing 'the'A assembly of frame of the loading attachment with the attach- 'mentmfraxn i j Fig. 4 is a sectional view as s'eenalong the linel the rear end `of the upright 4-4 in1 1g.3;. Flg.r5 is a sectional viewtaken along the line 5-5inFig.`1;'- Xl., f f Fig. '6 is a longit dinal sectional view'of the loading attachmenty bodyf'of the tractor being removed forthe purpose of clarity;

Fig. 7 is'a'n enlarged front Velevational viewv ofV the loaderattachment'v removed fromthe tractor Fig. 8

- Fig. 9 isa transverse sectionalview Vof a loadlifting arm taken along the line l--S in.Fig'.'8;`

' Fig. 10 is a arm -asseen along `the line I I'I i' in Fig. 10;

- Fig. 12 is a side elevational view of the loading attachment, shown in Aassembly relation with a tractorand with the. load-carrying unit a loading or. lowerrnost position;V

'.Fig.v 13 is an enlarged plan view'taken onthe in Fig. V16v showing a mum position omitted for the forwardends ofthe lifting arms'.A

Fig. 14 is a detail rear perspective view ofthe latching mechanism for holding, the load-carry-V ing unit in anormal position;

.Fig. 15 is. affragmentary side ,elevational5 view ofthe load-carrying unit, with the load-carrying unit shown in 'sectiD and c in'alocked position; Fig. 16 is a plan view of the'loading attachment andY tractor assembly Fig. 1 '1 is a sectional view .on Fig'. 16.y showing a part of `the 4 brake and clutch mechanism for the vhoisting means; and

Fig. 18 is a sectional view along brake lever and 'a clutch lever'forlthe hoisting meanslconnected together for complementary. operation mechanism. i Y The 'loading machine oi this inventionis illusby a lost motion showing; the load-lifting' ,arms inv a'partially elevated positiong'with theV and the load-carrying unit isav longitudinal sectional view of a loadlifting armas seen along the linef-B in Fig. '1;

Y c longitudinal sectional .view of a rhooster'arrn on the line 10,-] 0 in Fig.`7;

Fig. il ls a transverse sectional view of a boosterV1 `shown in Fig. 6, with the scoop broken away and a part 'of the mechanism forautomatically stopping the scoop at its maxipurpose of clarity; the line l1 `-I1 in members lnclinedldownwardly and rearwardlyv from the 'upright framel 'to the attachment or main frame. The front or free ends of the lifting arms project forwardly of the upright frame and f carry-a load-carrying unit which is elevated and lowered by hoisting means including a cable suspended from the upright frame and .operatively connected with the front ends of the. lifting arms.

hoisting means includes a pair of winding drums mounted. adjacent opposite ends of a shaft rotatably supported on the main frame. A single cable has its opposite ends attached to the drums,

and is operatively associated with pulleys on the upright frame and at the. free ends of the lifting arms so as to provide. for anequalized or balanced pulling force on the lifting arms whereby the arms are positively lifted together.

'I'hefhoistingjmeans also vincludes manually operated clutch and brake. control levers for controlling the operation of the winding drums.

These two levers are connected together by a lost motion mechanism to provide for a comple mentary action on manipulation of either one o ythe twov leversf In other words the clutch lever When the load-carrying unit isV in a loweredV I position the pivot means at the rear ends of. the lifting,- arms are `a .i; thei r lowermost positions of travel on the inclined guide members. At this positionof the lifting arm pivot means,A each lift` ing arm has a, portion at its rear end in contactingfengagement' with'a part of the"attachmentv main frame yso'that when the load-carrying unit is being loaded, asbya usual. bucking operation, the bucking `force is applied through a lifting arm againstthe main. frame. The pivot means-'are f thus entirely free ofthe bucking force..

on an initial elevation of the 10aa'-"cilwr'yingv unit the pivot means are releasably retained 1n their lowermost positions by curved uprightguides supported .on lthe main frame and adapted 4 for` contacting engagement with the lifting arms; j As a result the lifting arms are only pivotaily on being operatedalso operates the brake lever so that the rotationA of the winding drumsis arrested 'or stopped when the clutch mechanism is disengaged. and the brake released `when the clutchmechanism is engaged with the driving means for the winding drums. As a' result the usual neutral position between the `braking and clutching 'operations is eliminated, with a proper sequence` of these operationsV taking place by virtue of the Il0st.n1 tion in the mechanism c'on necting the brake and clutch levers. The lost motion in the connectingmechanism also provides fora manipulation of the'v brake lever in.

movable upwardlyto initially raise the loadcarl rying unit in apath adjacent the forward side of the upright frame to a predetermined eleva tion. On a continued raising of the load-carry." ing unit, above such predetermined elevation, thel lifting arms are moved out ofcontacting engagement with the curved upright guides concurrently with the engagement ofthe lifting arms by the free .ends of jbooster' arms,` pivotally supported from a positionadiacent the top of the upright frame. AThe booster arms act to move the liftingl arms in a direction toward the front of the tracwardlyawayfromthe upright frame.

tor, to' in turn move the load-carrying unit formeans for' the lifting" arms are moved upwardly on the inclined guide members. The concurrent dependently `of the clutch lever between defined limitsf" With reference to the drawings the invention is" shown in Figs. 1, 6 and 12 in assembly relation with a tractor having ka front axle i1, a rear axle I8, front wheels I9 and rear wheels 20. The

loading attachment has a main frame, extended` about'and 'secured to the tractor frame, and including longitudinal frame members; I5 and I6.

v `and secured to the axle forward and pivotal movement of the lifting arms continues until the loadecarrying. unit is raisedl to its highest elevation. At this elevation-the load-carryingunit isata'distance forwardly of the upright frame such that the loading machine is able to -be readily driven adjacent a dump truck or the like with. the loading unit positioned above thetruck body, whereby'the material in the lloadcarrying unit. can be dumped directly intothe truck.'

It is seen, therefore, that the load-carrying unitv islled and initiallyraised while'it is adjacent to the upright frame so as to' appreciably reduce any tendency of the rear end of `the tractor beinerr lifted from the groundV during these operations, and that th loadcarrying unit isl moved forwardly away from the upright frame only'as vit approaches its maximum elevation.

The tendency of the rear end of the tractor being tipped upwardly is further reduced by the arrangement of a hoisting means on the main attachment frame in a tractor rear axle. A cable winding means in thev position rearwardly of the' The frame members I5 'and'IG are mounted adjacenttheir forward ends on the tractor by means including connecting members with'th rear end'. portions of `the members I5 and I6 being mounted on the vtractor rear axle 'I8 on blocks y a usual U-clamp 60a (Figs. 6 and 16).

Eachframe member .I5 and I6 Ais comprised oa front'portion or section 2| laterally oiset from a rear section 22"(Figs. 3 and 4). At the oilset the Vad acent ends of the front ti 2i 'During this action of the booster arms the pivot j sec on and rear Vsection '22 arein an overlapping rela tionV and. spaced apart from each other Iby a separating member 23, which is welded or otherwise secured between the overlapped ends in a parallelrelation with the front and rear sections 2| and 22, respectively, sothat each lframe memb er I5 and Il isof a unit construction. A rear frame extension, indicated generallyat 24 (Figs. 2 and 16) is attached to and extended rearwardly which will be later explained.

`Mounted on` the front ends of the members I5 and It is 'anfupright frame'section 2l,inclu'ding a horizontal top frame section 2B and a downwardly andrearwardly inclined frame section 21 (Figs. 1 and 2). The rear frame section 21 includes a pair of framemembers 28 and 29 arrangedy at opposite sides of the upright frame 25 and having their lower ends terminated at the oiset in from the frame members I51and I8 for a purpose the main frame members |5 and I6. As shown i'ng a rounded rear en 35 having a net plat rotatably supportedguide. or retaining sections main frame members movement, an

3 the downward movement ofV `this position thea'.

rollers V 3 9 on thearms clined channel'jrame imi-helplane-targatcgrresnondins Separatinsfor. spacing ;member.f23 in Is'and 15, nespectively.

The lifting arms opposite sides of thetractor f rame. Sinceeachg lifting armA is of alike construction and similarl`y assembled with acorrespondingframe or guide). member.28 .and 2 9 only thearm 32 will be referred, to-in the following,detaileddescription- The arm 32 is cfa box-like constructionhavd and an outwardly tapered z rised of a. channel member e Ijw.e1ded on each Vsidey thereof Fi'gs, 6,238- ar 1d j9v) ..y The top'ofY-thefarm 32 is closed by the upper-leg of the Vchannel mxnber. y315-. while thefforwardendof the bottom o f the, arm 32 is closed by a plate member I5 welded 1 between the arm side members 4 0. As clearly lap; pearsin Fig. 8 theb rear :portion is closed by the lowerleg-offthe'E channel member 35. The rear endo tthearm 32 includes -a bearing block 34 .having a ,-straigl'it portion 36 adapted to be inserted .within and, welded to the rear end ofthe arrn, and a roundedportion 3 1 which lprojects outwardly: from-,the main body of the arm, -f

.A pivot means 38 frontend andis comp for` each' arm 32 Tand-.3 3 in a. bearing block' 3.4... (Eissff and8).- Mounted at oneend of thepivot 3 8 is L a roller 39 receivablewithin-the channel 'of a corresponding frame member 28 .and 29-formove Y ment longitudinallyof suchmember. The roller. 39 Vis guidably retained within .the channel by the -3I With the rollers 39 in assemblyrelation with' thelframe'members 28and 29, the arms 32 and corresponding frame mem er28 and 29 and substantially in the planeofa rearjsection 2 2 in ther VI5 `and |61 .Itfis seen, therefore; that each lifting arm 32and33is snpd down pivotal,

ported at its rear 'end forgup an d formovement-- forward1y and he tractor byvirtue of the. support.`

v`rearwardly of t longitudinallyofi.

of the rollers 39 Vfor movement the frame members 28and29.

vAs shown for fthe 1i fting arm aplici-l'lfleansY 3?.. and' in turn of .an associated roller 39 is limited` by the coacting engagementof the-rounded'porf tion 31 of the'bearingfblok. witha mating. curved stop member 4l welded to thel front of the' rear section `22 -of the main frame memberj'lS.' The stop member 4| is extended below the lower end of the inclined guide or frame member 29 so lthat vamating V engagement is accomplished when-the pivot .means 38is moved Y.toV its -1ow er v most position. When 3311s capable vf beine nivot'ally moved by 'virtue of the rotational movement of the bearingblock 3 4 relative to the s 'top member- 4 I. T0 facilitatethe assembly'ofthe arend sa witnthe 111.-' members 28 Land 29'an opening 42 is 'provided yin the' sides of 'the guide' members 28. and 29 of` a site; to' freelyreceiyethe rol1ers'39. The opening ,42 is- 'adjacent the top of the frame membersii and 29 'at apositio'n" above 'the'u'sualtravelof 'th rollers normal operation of the"loadingmachine;`A

AThe front Vends of 'the' arms -32Jan'd 33 are "of a'n'open constructionras'v shown for the.: arm32: in Figs. 6 and 8, and'each arm-carries l-a like adjustable. combination supporting `and `cover. unit or shovel seat 4.3 of a substantially charinelshape in .cross section which are .pivotally supported .on

v the -rnain,frame members a e rigetta@ l the pivot means .Nilisnty Swap;

ottoni of the Varm 32g overits j f 32land 3 3.

is a' rollr 55 adapted forf rolling' .eqgfgement with. 25. awrresp'nding upright-curved cuide 58 53 is .spborted'on each of, the'm'ain tra upright framev fby. 30.

' curvature oftnej gui of y'1'Iiov e'n"i'ent defined 33 areadiacent a.-

j moun'te adjacent their'. top;i

of 'thev booster' arm the arms az. and .331163: 'tion Y0f. travel.' a'S'ShQ'WI1 the. .19d .6.' their.' front .191'.

' are out' of engagement Y with ssnuringa'f about the rod M for' pu 4511151 lfif the @m15 3 units 43,' respectiv isjofa bfoxfrlike construction \.co

a rod` M carriedbetweenthe arms. and. )L 'nie isaccomplishdbytheprovi 42 a1 1d 33,and supporting ely, t

a rod 48 h and 8);'

The:lOW forwardly from .the 'arms .3 5| on. which a scoop or; Shown .in les; and 1.3 The uppernds oitlieunits was .49! v(Fiss, 16. 'l.

toplevel of the .arms 32 and carrying a .latch and ,trip' 5 2. .15. retaab1yismpef ds .ofthe Etunisie. Supported. between the met? :L 3 r arwarmy'qr upwardly'and forwfrdly f unneeded 'with the members( in;

ceivingfthe rod 6I.

forwardly of sopporta: ...una-1rrpose .tobe 'later ii'oted. I' 'sion of'aligneds1ts "rough which is, inserted tcdpetweenf the 11pd snbsiantenybemnd dito @etage a De!! nerriachinealslsunie;

Since the b ooste'rriT only pivotally moved about the pivot means 38 by virtue of the guiding *engagement of therollers 55 with the curved guides 58. This engagement maintains the pivotal means 38 at their lowermost positions onthe frame members 28 and 28.

The initialupward pivotal movement of thellfting arms 32 and 33 continues until the rollers 58 are moved upwardlyto a position out of contacting engagement with the guides 58. As the rollersl 55 approach this position the shaft 54 between the lifting arms32 and 33 enters between the bifurcations at the front ends 68 of the booster arms 58 and 51. Asthe lifting arms 32 and 33 continue to move upwardly they are concurrently moved forwardly'of the upright frame 25 by the travel of the booster arms 56 and 51 about their pivotal support 6|. On a forward movement of the lifting arms 32 and .33 the pivot means 38.-

are moved upwardly on the frame members 28 and 29. The concurrent pivotal and forward movement of the lifting arms 32 and 33 provides for the scoop 52 being moved forwardly away from the upright frame 25 as it is raised to its maximum elevated position'shown in Fig.r 1. On

dumping of the scoop 52 the lifting arms 32'and 33, on lowering of the cable 1|, are returned to their lowermost positions, shown in Fig. 12, by the cooperating action of the booster arms `58 and 51 and the rollers 55' and guides 58.

It isseen, therefore, that the scoop 52 is initially elevated to a predetermined height along an arcuate path adjacent to the upright frame 25 Y so as to reduce the tendency of the rear tractor wheels 28 being raised from the ground. The

' predetermined height is such thata portion `of the weight of theload in the scoop A 2 is applied against the rear wheels 20 to maintain them in a grounded position prior to the operation of the booster arms 58 and 51 to move rthe scoop 52 forwardly away from the upright frame 25. Y

The loading of the scoop k52 is accomplishedl when the arms 32 and 33 are in their vlowermost positions, shown in Fig. 12, by driving the tractor forwardlyinto the material tov be loaded. For various materials, and for different elevations of the material with respect to the elevation of the tractor, it is necessary to have various positions of the scoop relative to the ground. Since the scoop `52 'is pivoted on the supporting units 43 this adjustment is simply accomplished by loosening the nuts 49 on the shaft 48 and then pivoting the supporting. units 43 about the shaft 44 until the scoop is at a desired angle relative -to the ground. The nuts 48 are then tightened to hold the scoop in an adjustedposition.

In a bucking operation it is apparent that an appreciable force is applied on the arms 32 and 33 in a rearward direction.' In the present invention this force is transmitted from the arms 32 and 33 directly to the rear sections 22 of the main,

frame members 5 and |8'so as to be counter-v acted at all times by members capable of with standing large strains. The transmission of the bucking force through the lifting arms to the frame members |5 and I5 takes place by virtue' of the contacting engagement between the bearing blocks 34 at the rear ends of the lifting arms, with the stop members 4| at the front ends of the rear sections 22 of the frame members |5 and |8. No part of the bucking forces, therefore, is at any time applied to the pivot means ,88' or rollers'39.`

The hoisting means for elevatingl and lowering the arms 32 and 33 includes the single cable 1|,

previously mentioned, which vhas its opposite ends` attached to winding drums 14 and`16 mounted at opposite ends of a shaft 11 rotatably supported transversely of the rear frame u nit 24 (Figs. 2, 6 and 16). The cable 1| -from the winding drum 14 Vpasses under a pulley 18, carried on the main frame memberv I5, and upwardly'under a tensioning pulley r18 supported on an arm 80 pivoted on the upright frame and acted upon by a tension spring 85. From the pulley 19 the cable 1| extends over a pulley 8|! supported for rotation in a vertical plane on a shaft'82 carried in the top of theframe portion'28. Cable 1| extends downwardly from lthe pulley 8| `(Fig. 7) about the pulley `13 at the forward end of the lifting varm 38 and then upwardly about a pulley 83 rotatably supported on the shaft 82 adjacent the pulley 8|."y From the pulley 83 the cable passes aboutqav pulley l84 located rearwardly of the pulleys-8| and 83 and rotatably supported on a pin 86 in the top frame section 26 for rotation in a horizontal plane (Figs. 2 and 16) f An arrangement of pulleys 81, 88 and 88 similar to the pulley arrangement 8|, 83 and 84, respectively, is operatively associated with the pulleyV 12 for the lifting arm 33,' the cable 1| from the pulley 84 passing about the pulleys 88 and 88 downwardly'to the pulley 12, upwardly about the pulley 81, and thendownwardly'under a tensioning pulley 18a and a pulley 18a to the winding drum 16, the pulleys 18a and 18a being constructed and assembled with the main frame member 6 and upright frame 25, respectively, in all respects similar` to the construction and assembly of the pulleys 19 and 18 with the main frame member |5 andfupright frame 25, respectivelyr (Figs. 7, l2 and 16 Thus by the use ofa single cable 1| for elevating bothl of the lifting arms 32 and 33 the opposite ends of the cable 1| are concurrently acted 40 upon by the winding drums 14 and 16. Any

tendency of one of the lifting arms 32 and 33 to lag or lead the other arm during a lifting operation is thus entirely eliminated since any slipping or slack at one end of the cable 1| isimmediately taken up at the other cable end.

The shaft 11 on'which'the winding drums 14 and 18are mounted is connectedthrough a transmission mechanism, indicated generally at 9|, with a power take-oil 82 for the tractor through a clutch mechanism 83` (Fig. 16). The winding drums, transmission 9|, and clutch mechanism 93 are all supported on the rear frame unit 24 at positions rearwardly of the tractor rear axle I8; As a result of this arrangement of these parts,

Ytheir weight'y counter-balances a portion of the load 4lifted by the arms 32' and 33` whereby to reduce the Atendencyof the rear end of the tractor being tipped upwardly when'large loads are to .be raised. i

The elevating and lowering of the lifting arms by the cable 1| is controlled by a manually controlled'clutch lever 84 and brake lever 96 (Figs. 16,17 and 18)', which are conveniently and accessibly located relative tothe tractor operators seat 91. A clutch shaft 98 arranged transversely of the tractor frame isk rotatably supported in the housing vfor `the clutch mechanism 93 and in a |bracket 98 mounted on the,l main frame, member |5. The clutch lever 94 is vmounted on the clutch shaft 98 adjacent to `the frame member |5. The clutch mechanism 93 is operated to connect and disconnect the transmission 9|^with the y power` take-olf 92 by merely moving the clutch lever 84 rearwardly and forwardly, respectively,

of the rocker 'armbeing slidablyrconnectedby a pin and slot connection |06vvwitl1' a lever-|01. The

with the -free end of an VarmV |708 pivoted on theV e frame member l forwardly of thebr'ake lever 96.A

' Azslidable movement/of the lever |01v relative to the arm |08 is limited in one direction by a stop K |09 and in the other direction by the action of a compression spring The clutch control lever 94 is pivoted to one endof a lever I|2-`the opposite end of which is connected with the arm |08 through a. pin and slot connection H3.

Mounted on the rotatablesleeve' |04 is a second rocker arm H4 having its free end pivoted between the corresponding one ends of a double Thuson movement of the clutch lever 94 toward the" right, as view ed in Fig. 18, to disengage the operative action of the lever H2, arm |00, leverv opposite end of the lever |01 isslidably connectedlO power l take-oil 92 from the transmission 9|, the

brake lever 96 is concurrently moved toward the "rightto set the brake ||9'|2| through the co- |01 andlrocker arm |02. By virtue Vof the lost motion connection H3 between the lever H2 and.

- arm r|00 and the lost motion connection |06 be- C-shaped toggle 1ink-||6. e A lever' H1 has one end pivoted 'between' the opposite' corresponding Y `ends of the'c linlr."||6,v while the other end of the lever ||1.is pivoted to one end H801 a brake Band 'us operatively associated with n` brake drum |2| mounted 4on theV shaft 11. The lever in is pivotally supported intermediate' its ends on a bracket |22 suspended from'aframe'member |23 extended laterallyacross the vrear Yframe.

tween the lever |01 andthe rocker arm |02, the brake lever 96 is operated only after the clutch mechanism 93 has been operated to its disengagedposition Likewise on operation o! the brake lever 96 the clutch lever' 94 is` operated' to disengage they clutch mechanism 93.7when the brake ||9|2| is applied, and to engage the clutch mechanism when the brake is released.

The `slot and pin connections4 |06 and H 3. provide for a limited movement of the brake lever 96 independently of the clutch lever 94 whereby the lowering of the arms 32-33 is kcontrolled entirely by the manipulation of the brake lever. On a. continued movement' of the brake lever 96 beyond a brake-releasing position the clutch lever 94 is operated to engage the clutch mechanism 93.

A n'automatic operation of the clutch and brake levers94 and'96 to stop and hold the scoop 52 at unit 24. vThe opposite end '|24 of the brake band 'e H9 is connectedfto a rod |26 having its free end pivoted to the lever H1 intermediate the pivotal connections ofthe lever I1 with the-bracket |22 and the C link H6.

. The rocker .erm munie Hs, ylever "|11, and' positions providingfor a release of vthe brakev drumV |2| bythe brake band H9. On rotation of the sleeve |04` in a clockwise'direction about the shaft 98,- as viewed in Fig; 17, which rotation corresponds. toa movement'toward the right of the brake control lever 96, as viewed in Fig. 18,

Ythe C link H6 is moved to its dotted line position shown'in Fignl'l to provide for the brake band H9 being tightened around thebrake drum |2`|.

the C link H6, when thevbrake vis applied,'being in a plane common'with the axis ofzrotation of 1 the sleeve |04 a toggle action is produced lwhich its highest elevated position i's accomplished by 'means including an actuating lever |21 pivoted adjacent the top and to one side of theV inclined frame member 29'L (Figs. 1 and.6). The free end E of the leverV |21,` is 'bent outwardly from the frame member 29" into the path of movement of the lifting ann 3a. A` cable |28 is attached at one en d to the arm |08, forming part of the lost motion mechanism connecting together thebrake 'lever 96' and clutch lever 94', andis .then guided By virtue of the pivots at thel opposite .ends of i ,by means including a pulley 29 on the main *frame`member I5, to the actuating lever |21 to which thel opposite, end oLthe kcable |26 is attached.

VAs the arm rapproaches, its vhighest elevated' 'position' it engages vand pivotally moves the actuating lever |21 in a clockwisedirection, as viewed in Fig. 6.l This movement oi.' the actuatingv lever K |21,-througli the cable |28, moves thek arm |08 forwardly of the tractor or to the left, as seen Vin Fig. 6 to disengage the clutch mechanism93 i and apply the brake |9|2|,` respectively, The

locksthebrake band |9 in its braking position. i

BecauseA of the direct pivotal Vconnection of 'the I brake levervilwiththe rocker armVy |02, through the link member |03, the Vabove described brake 'releasing and applyingzoperations areV effected directly by manipulation of the brake lever V96 in opposite directions.V

When the` clutch lever 94`=` and brake lever 96 are individually operated in; sequence it is apfk parent that al so-calledneutral` position will generally occur between the clutching and .braking l operations, at which neutralposition the brake is released at'the timefthe clutch mechanism is disconnected from the shaft 11. Asa result when drums y14 and 1s the drumsy win-not leeV immediately held against rotation so that the load on the lifting arms 32 and 33 will fall 'a short distance before the brake is applied. Similarly when Vthe brake is first released ythe load'on the arms 32and 33 will drop beforee'power.,Y is applied to i the winding drums 14 `and 16.l This neutral posiy -tion is eliminated inthe present invention by virtue of the lost'motion mechanism connecting brake is thus applied concurrently with the dis engagement of theV clutch mechanism, with the c, power is nrst ydisconnected fromVV the ,winding lost motion in the rpin and slotv connections |06 and H3 providingrforthe clutch mechanism being disengagedpriorY toY the application of the brake. The scoop 52 is lowered from its Vmaximum elevatedr position by the independent operation ofthe brakelever' 96 in the mannerdescribedabove. f

Thescoop 52 is heldin Va normal position by a pair'of latching members |3| pivoted adjacent opposite-ends of the shaft 53 and arranged inwardly ci the supporting units 43 (Figs. 13, `14 rand 15)... jThe` latches |3| are maintained in a spaced relation on tne shaft 53 byy end collars |32 and an intermediate sleeve |33..V Eachlatch Y has one end movable into engagement withacorresponding ,upright catch |34 supported on the back of the scoop 52 and is yieldably held in engaging position by a spring |35 connected at one end to a corresponding lifting arm 32 and 33 vMounted on the intermediate sleeve |33,.which -is rotatable onv the shaft 53. are a pair oi' trip together the clutch lever 84V and` the brake lever v llifting arm 32 and arms |35, corresponding to the latches |3|, and

a trip lever |31.

The trip lever is connected to one end of aY the pulley |39 the cable |33 passes upwardly and about a pulley |42 supported on the inclined frame member 23, then downwardlyfor attachment to the rear end of the lifting arm 32.

a normal slack is maintained in the cable which is substantially the same for all moved Positions of thelifting arm 32 and in turn for all moved positions ofthe scoop 52. Thus when thearin-32 1 intermediates; ends. n

off the yreturn means Varm 32, and then downwardly and rearwardly about a pulley. |53 supported adjacent the bottomv of the arm 32. From the pulley I53'the-cable i5i travels upwardly for attachment tothe arm |44 L and the am a2' and ningtheir lowermost posi- By virtue of this arrangement of thecable |33 i f i is only pivotally moved about its pivotal means 33,y with .the pivotal means at-its lowel'most` pomtion shown in F13. 12, the cable lengthy between the pulley |42 and the pulley |33 at the rear end of the lifting arm 32, and the length of the cable between the trip lever |31 and the pulleyV |39 remain substantially unchanged.

When the arm 32 is pivotally moved out of contacting engagement Ywith the curved guide 53, and is then vpivoted and concurrently forwardly moved by the action of the booster arms 6 and 51, the

shortening ofthe cable length between the rear end ci' the arm 32 and the pulley` |42 compensates for the increase in the cable length between the pulley |39 and the trip lever |31. As a result the movement of the control lever i 4| rearwardly of the tractor, or toward the right as viewed in Fig. 1 2, is always effective at all moved positions of the scoop 52 tol tighten theY cable length between the control lever |4| and the trip lever |31 to pull the trip lever toward the right as also viewed in Fig. 12. v

Since the intermediate sleeve |33 is rotatable on the shaft 53 movement of thetrip lever |31 by the cable |23 takes place independently of any movement of the latches I 3| Thus on rotation of the sleeve` |33 in a counterclockwise direction, as indicated by the arrow in Fig. 14, the trips |35 engage and move the latches |3| out of anV engaging position with the scoop 52.

The dumping movement of the scoop 52 is limited by a usual spring and chain assembly |43, in a well known manner, with the assembly being connected at one end to the back of the scoop 52 and at its opposite end to the front end of a 33, a spring and chain assembly |43 being used at each side ofthe scoop 52.

The scoop 52 'after being dumped is automatically returnedto a normal position by the provision of like means'arranged at opposite sides of the upright frame 25 and including a pivoted actuating arm |44 (Fig. 12). Since the scoopreturning means at each side of the upright frame are the same in construction and operation only' the one associated with the lifting arm 32 will be fully described.

The actuating arm |44 is pivotally supported the catch members |34 ontions as shuwam 12'. at'mesepo'sitions of meaning erinnerung,- vline-, 'siblelili, 'and vvirtue the Vpivotal support 'oiff the? 'actuating |44'at the rearfentls'` ofthe lifting arms 32 and '33, and the support' of the rollers l|45 in the frame members 23 and 23, the `lifting arms 32 and 33 on initial yupward pivotal movement, in the mannerepreviously described, are angularly moved toward thek actuating arms |144 to relative and the actuating arm |44. 40 ing arms 32 and 33 are moved forwardly by the positions substantially parallel with thel actuating arms |44 as illustrated in Fig.' 1 for the arm 33.

This relative positionof a lifting arm with an actuating arm |44 takes. place at the time the rollers 55on the lifting arms 32 and 33 move out of contacting engagement with the curved guides 53, and is maintained during the forward movementof the 'lifting arms 32 and 33 by the booster arms 55` and 51.

As a result. the tension in the spring |49 applied on the scoop 52 to pivot the scoop upwardly and rearwardly into engagement with the latches |3| is progressively decreased during the initial upward pivotal movement of the lifting arms 32 and 33 because of the progressivedecrease in the length of the cable |5| between the pulley |53 Thus when the liftbooster arms 53` and 51 the cable |5| is slack and the spring |49 is without tension as shown in Fig. 1.V Thescoop 52, therefore, is dumped without opposition from the spring |49.

After the scoop 52 is dumped the spring |49 and cable |5|are placed under'initial tension by the arm |43,v pivoted on the scoop 52, moving the arm |41 in a clockwise direction as viewed in Fig. 1. This initial tension is maintained during the lowering of the arms 32 and 33 until the rollers 55 on these arms engage-the curved guides 53.

With the rollers' 55 in contacting engagement with the guides 53 thevlifting arms 32 and 33 are `pivotally moved downwardly away from the actuating arms |44 whereby to progressively increasethe length of the cables 15| between the pulleys |53 and the actuating arms, whereby the initial tensionin the spring |49 and the cable l5| is progressively increased. This progressive increase or building up a pressure in the spring |49 takes place until the spring pressure is suiilcient to overcome the load of the scoop acting to retain the scoop in its dumped position. When this load is overcome, the stored up spring pressure is capable of Vquickly moving or snapping the scoop to its normal position in operativeengagement with the latches III.

From a consideration of-the above description, therefore, it is seen that the invention provides -a loading machine, which is simple and rugged in construction and capable of emcient performance under all operating conditions.v The scoop 52 in a lowermost position and during its initial eleva- Ytion is located adjacent the upright frame 25 concurrently with rearwardly from said upright frame to the 'offset in said frame member,l a-pivoted lifting arm, a pivot means at the rear end of said lifting arm movably supported on said guide member for movement longitudinally thereof, with said lifting arm being pivotally movable in the plane of said rear portion, means providing for a movement of said pivot means on said guide member a pivotal movement of said arm, with said pivot means being at said oilset when said arm is in a lowered position, Vand vco- .acting portions on the rear end of said lifting arm and on the front end of said rear portion adapted to be in contact engagement when said arm is in said lowered position, whereby to provide for said pivot means being free of any force applied rearwardly on said arm in a lowered position. Y Y

'1. In a loading machine having a frame, hoisting means including a driven shaft rotatably supported on said frame, driving means for said driven shaft, a winding drum mounted on said shaft, clutch means for connecting and disconnecting said driving means with said shaft, a manually operated pivoted clutch control lever for said clutch means, brake means for selective- 1y holding saidshaft against rotation, a manually' operated pivoted brake control lever for said brake means, and lost motion means connecting saidtwo levers together for concurrent operation including a pivoted actuating arm for said brake means, a lever member pivoted at one end on said frame, a rst link slidably supported between the free ends of said actuating arm and said lever member, a second link pivoted between said actuating arm and brake control lever, and a third link pivoted to said clutch control lever and slidably connected with `said lever member,said lost motion means on movement of one of said two control levers providing for a complementary operation of the other of said levers so that only one of said brake means and clutch means is in an operated position. y

8. A loading machine comprising a frame, a pair of pivoted lifting arms arranged at opposite sides of said frame with their rear ends pivoted on said frame and their front ends projected forwardly from one end of said frime, scoop supports adjustably carried on the front ends of said arms, and a scoop movably supported on said adjustable supports for movement relative to said supports to loading and dumping positions, with adjustment of said supports relative to saidarms moving said scoop to an adjusted position relative to the ground surface.`

9. A loading machine comprising a frame, a pair of lifting arms arranged at opposite sides of able pivotal movement in a plane longitudinally of `said arms, means forholding said scoop supports in an adjusted position, and a movable scoop carried on said ysupports for adjustable '.movement therewith, with said scoop, at an adjusted position of said supportsI being movable relative to said supports to loading and dumping positions.

10. A loading machinecomprising a frame having an upright portion and a horizontal portion, a frame member extended downwardly and rearwardly from said upright portion to said horizontal portion, a pivoted lifting arm, a pivot means at the rear end of said arm movably supported for movement longitudinally of said frame member, ascoop pivoted adjacent the front end of said lifting arm, means releasably holding said-scoop in a normal position, means for concurrently pivoting said lifting arm and moving said pivot means upwardly on said frame to lift said scoop to a dumping position forwardly away from said said frame, means` pivoting said arms adjacent one end thereof on said frame, scoop supports pivoted on the free ends of said arms for adjust- Vupright frame portion, a trip member operatively associated with said scoop holding means, a pivoted control lever on said horizontal frame portion for operatiing said trip member to release said holding means, a pulley'rotatably supported on said-control lever, a second pulley carried upwardly on said frame member, and a flexible means 'connecting said control lever and trip member having one end attached 'adjacent the rear end of said lifting arm, and extended about said second pulley and'then about said first pulley and having its opposite end attached to said trip member.

11. A loading machine comprising an upright frame, a pivoted lifting arm, pivot means at the rear end of said arm movably supported on said frame for movement in a forwardly and upwardly inclined plane, load-carrying means carried at the front end of said arm, means providing initially for only a pivotal upward movement of said arm to elevate said load-carrying means adjacent said frame to a pre-determined elevation, and a pivoted member pivotally supported on said frame for up and down movement, said pivoted member being engageable with said arm at said pre-determined elevation for movement with said arm, with said pivoted member, on s. continued upward movement of said arm, acting to move said pivot means forwardly and upwardly on saidv frame. whereby to extend saidarm forwardly of said frame.

12. A loading'attachment for a tractor comprising a main frame having a longitudinal frame member with a front portion laterally offset inwardly from a rear portion-thereof, a pivoted lifting arm, and means pivotally supporting said arm on the-front portion at said offset for pivotal movement in the plane of the rear portion of said frame member, and veoa'cting portions on the rear end of saidlifting arm and on the front end 4 of said rear portion adapted to be in contact engagement, when the arm is in a lowered position, to providefor said supporting means being free of any bucking force applied in a rearward direction on said arm.

HERBERT F. LEssMANN. 

